Marine-type steam boiler



Jan. 3, 1928. 1v 654 80 y c. G. HAwLEY 9 MARINE TYPE STEAM BOILER Filed Sept. 24 1921 /////////////////J N v Inventor Patented Jan. 3, 1928.

UruTlazDV STATES vlCHARLES GILBERT IIAWLEY,l oF cIIIcAGo, ILLINOIS.

MARINE-TYPE STEAM IBOILIEIR.

Application led September 24,1921. Serialplo. 508,065.y

This application is companion to my applications S. N. 500,107 and S.' N. 503,064, of Sept. 12, 1921, and Sept. 24, 1921,.respec tively, and has to do with a new boiler close- 5 ly akin to lthose of said applications but which, under certain circumstances and for certainuses, is more compact, of less weight and generally more economical.

This present invention comprises a bank l of Vwater tubes. and the `upper and lower' drums belonging thereto, in combination with a plurality of cylindrical header drums that extend from the side of the upper drum of the tube bank, and a substantially l triangular water-wall for and in communr cation with each said header drum, the same in each case depending from such header drum and having a bottom or lower end which terminates in a relatively small intake or neck which opens through the side of the lower drum of the tubeM bank.y

Various additional features of my invention will appear hereinafter.

The invention will be readily understood on reference to the accompanying drawings, in which Fig. 1 is a front elevation of la steam boiler embodying my invention, partly in vert-ical cross section on the line 1-1 of Fig. 2; Fig. 2 is a vertical longitudinal section of the boiler, on line' 2-2 of Fig. 1; and Fig. 3 is a detailed view of a modified form of a water wall. Y

The before mentioned bank of vertical water tubes is indicated by the reference nu` meral 2. The upper drum is marked 3 and the lower drum is marked 4t, both belonging to the bank of tubes. The parts 5 are the cylindrical header drums which, as shown, communicate with or enter the side of the upper drum 3. The parts 6 are the before mentioned water walls, one drum 5 and each presenting a slanting, bulbous bottom 6 that terminates in airin take 6" which communicates with or opens through the side of the lower drum 4f.

When desired, the slanting bottom 6 of each water wall, may, at thefront end, terminate in a blow-oftl neck 6', or, if desired, each of these substantially triangular water walls may partake of a moretruly triangularshape, and have a bottom which extends uninterruptedly from the intake neck 6 to the front end of its respective header drum 5. This arrangement is shown clearly in Fig. 3.

for each header 7 represents the steam outlet of the boiler. The parts Sfarehand-holes,which I provide in the top of the drums 5 and in the top of the drumB to facilitate the cleaning vof the internal surfaces of theboiler by means of the tools introduced therethrough. The part 9 is a blow-off connection for the 'lower drum.y The feed water may enter through the upper or the lower drum.-

The pressure vessel thus described is en-i closed within refractory wallslO which constitutes the sett-ing thereof. l

The forward chamber 11 constitutes the lire chamber and contains the severall vertical water walls, 6. The heat of the fire in the chamber 11 is directly vcommunicated tothe extensive surfaces of the water walls and thereby a vigorous circulation of boiler watery is set up; downward through the tubes 2,l and upward through the water walls 6.v

A boiler of this design will be found to be of high capacity and reasonablyv high efciency. If itis desired Vto further increase the efficiency of the boiler, a second bank of" tubes 2. with drums 3 and 4, is added thereto, within the boiler setting. Thev parts marked r12, 13, and 14 are suit-- able cross connection pipes between the two banks of tubes.

The partsmarked 15 are bailes which vcompel the hot gases from the re lchamber to traverse all of the tubular surfaces` of the boiler before escaping at the out- The parts 17 and 17, are a blow-off conne'ctionv and blow-ofi` valve, for the several parts 6. of the water walls.

It is to be understood that each water wall is formed of relatively thin boiler plate and that the fiat sides thereof are connected by many, properly spaced staybolts, as shown. Any desired arrangement of bales 18 may be employed in the fire chamber proper, the same finding support upon andbetween the several water walls. f Y

It is to be noted that the drums 3, 3', and 5 mainly constitute the roof of the fire chamber. The roof is completed by brick slabs, 19, and .a covering, 20, of -non-conducting material, as well shown in the drawings.

The advantage of this construction, aside from the circulation enforced by the water walls, lies in the fact that Ik thus make it possible to advantageously assemble a maximum aggregate of heating surface, within a boiler setting of given dimensions. I-Iav-A i said header drum and opening into the bottom thereof, each said wall having an nclined bottom, the lower end 'of which forms an intake neck and means placing the intake neck of each said water wall in communication with said lower crossl drum.

2. A steam boil-er comprising a convect'ed heat absorbing portion having a steam and water cross drum iat its top, in combination with a plurality of header drums projecting from the side of said cross drum, a plurality of vertical radiant heat absorbing water walls positioned beneath respective header drums, the horizontal length of said walls substantially equalling the length of said header drums and the top of each water wall opening into the bottom of its header drum, .each said wall having `an inclined bottom, the lower end of which Vforms an intake neck, such intake neck joining the lower corner of each water Wall to the lower part of said convected heat absorbing portion.

3. A fire chamber of Ia height permitting the substantially lcomplete maturity of the flames of combustion, in combination with a steam boiler comprising a convected heat absorbing portion of major superlieial extent occupying the rear portion of said chamber, parallel header drums in perpendicular Communication with the top of said convected heat absorbing portion and occupying and partly forming the top of said lire chamber flame partitioning, radiant heat absorbing water walls positioned vertically in said fire chamber beneath respective header drums, said walls being in open communication with respective header drums` substantially throughout the length thereof, the bottom of each said wall being' downwardly and rearwardly inclined and termnating in an intake neck, and each said neck being in open communication with the lower pai-trof said convected heat absorbing portion.

In testimony whereof, I have hereunto set my hand this 22nd day of September, 1921.' v i l CHARLES GILBERT HAWLEY. 

